<template>
  <div class="list" ref='wrapper'>
    <div>
      <div class="area">
        <div class="title border-topbottom">当前城市</div>
        <div class="button-list">
          <div class="button-wrapper">
            <div class="button">{{city}}</div>
          </div>
        </div>
      </div>
      <div class="area">
        <div class="title border-topbottom">热门城市</div>
        <div class="button-list">
          <div class="button-wrapper"
            v-for='city of hotCities'
            :key='city.id'
            @click="handleCityClick(city.name)"
          >
            <div class="button">{{city.name}}</div>
          </div>
        </div>
      </div>
      <div class="area"
          v-for='(citiesByLetter, letter) of cities'
          :key='letter'
          :ref='letter'
      >
        <div class="title border-topbottom">{{letter}}</div>
        <div class="item-list">
          <div class="item border-bottom"
            v-for='city of citiesByLetter' :key='city.id'
            @click="handleCityClick(city.name)"
          >
            {{city.name}}
          </div>
        </div>
      </div>
    </div>
  </div>
</template>

<script>
import Bscroll from 'better-scroll'
import { mapState, mapMutations } from 'vuex'
export default {
  name: 'CityList',
  props: {
    cities: Object,
    hotCities: Array,
    letter: String
  },
  computed: {
    ...mapState(['city'])
  },
  mounted () {
    this.scroll = new Bscroll(this.$refs.wrapper)
  },
  watch: {
    letter () {
      if (this.letter) {
        const element = this.$refs[this.letter][0]
        this.scroll.scrollToElement(element)
      }
    }
  },
  methods: {
    handleCityClick (city) {
      // this.$store.commit('changeCity', city)
      this.changeCity(city)
      this.$router.push('/')
    },
    ...mapMutations(['changeCity'])
  }
}
</script>

<style lang='stylus' scoped>
.border-topbottom
  &:before
    border-color: #ccc
  &:after
    border-color: #ccc
.border-bottom
  &:before
    border-color: #ccc
.list
  position: absolute
  top: 1.68rem
  bottom: 0
  left: 0
  right: 0
  overflow: hidden

  .title
    line-height: .54rem
    padding-left: .2rem
    background: #eeeeee
    text-align: left
    color: #666
    font-size: .26rem
  .button-list
    padding: .1rem .6rem .1rem .1rem
    overflow: hidden
    .button-wrapper
      width: 33.33%
      float: left
      .button
        padding: .1rem 0
        margin: .1rem
        border: .02rem solid #ccc
        border-radius: .06rem
  .item-list
    text-align: left
    .item
      padding-left: .2rem
      line-height: .76rem
</style>
